ʻenehana pale ahi o ka lāʻau

Ma waho aʻe o kekahi mau huahana synthetic rubber, ʻo ka hapa nui o nā huahana rubber synthetic, e like me ka ʻōpala maoli, he mau mea hiki ke puhi ʻia. I kēia manawa, ʻo nā ala nui i hoʻohana ʻia no ka hoʻomaikaʻi ʻana i ka lapalapa ahi, ʻo ia ka hoʻohui ʻana i nā mea pale ahi a i ʻole nā ​​​​mea hoʻopiha ahi, a me ka hui ʻana a hoʻololi ʻia me nā mea pale ahi. Nui nā ʻano ʻenehana pale ahi no ka lāʻau:
1. Lapa waiʻona
Loaʻa ka NR, SBR, BR, a pēlā aku. ʻAʻole maikaʻi ka pale ʻana i ka wela a me ka hiki ʻana o ka lapalapa ahi, a ʻo ka hapa nui o nā huahana decomposition i ka wā o ka puhi ʻana he kinoea puhi. ʻO ka hoʻohui ʻana i nā mea pale ahi he ala koʻikoʻi ia e hoʻomaikaʻi ai i ka hiki ʻana o ka lapalapa o ka pahu hydrocarbon, a ua hoʻohana ʻia ka hopena synergistic o nā mea hoʻopaʻa ahi e hoʻomaikaʻi hou i ka hopena o ke ahi. Eia nō naʻe, pono e nānā ʻia i ka hopena ʻino o ka nui o ka lapalapa ahi ma nā ʻano mechanical o ka lāʻau.
Hoʻohui i nā mea hoʻopiha inorganic pale ahi e like me ka calcium carbonate, ka pālolo, ka pauka talcum, ke kalapona ʻeleʻele keʻokeʻo, Aluminum hydroxide, etc. He hopena endothermic ka calcium carbonate a me ka alumina nitrogen ke decomed. ʻO kēia ʻano hana e hōʻemi i kekahi mau waiwai kino a me nā mīkini o ka mea hao, a ʻaʻole nui ka nui o ka hoʻopiha.
Eia kekahi, ʻo ka hoʻonui ʻana i ka nui crosslinking o ka rubber hiki ke hoʻonui i kāna helu oxygen. No laila, hiki iā ia ke hoʻomaikaʻi i ka retardancy o ka lapalapa ahi. Ma muli paha o ka hoʻonui ʻia ʻana o ka wela o ka hoʻoheheʻe wela o ka mea lāʻau. Ua hoʻohana ʻia kēia ʻano hana i ka Ethylene propylene rubber
2. Lapa halogenated
Loaʻa i ka lāʻau halogenated nā mea halogen, me ka helu oxygen ma waena o 28 a me 45, a ʻoi aku ka nui o ka oxygen index o FPM ma mua o 65. ʻO ke kiʻekiʻe o ka mea halogen i loko o ka pahu halogenated, ʻoi aku ka kiʻekiʻe o kona helu oxygen. ʻO kēia ʻano lāʻau lapaʻau ponoʻī he kiʻekiʻe ka lapalapa ahi a hoʻopau iā ia iho i ka hoʻā ʻana. No laila, ʻoi aku ka maʻalahi o ka mālama ʻana i ka lapalapa ahi ma mua o ka lāʻau hydrocarbon. No ka hoʻomaikaʻi hou ʻana i ka hoʻopaʻa ʻana o ka lapalapa o ka pahu halogenated, hoʻohana pinepine ʻia ke ʻano o ka hoʻohui ʻana i nā mea pale ahi.
3. Heterochain rubber
ʻO ke ʻano o ka lāʻau lapaʻau ma kēia ʻāpana he dimethyl silicone rubber, me ka helu oxygen ma kahi o 25. ʻO nā ʻano hana pale ahi maoli i hoʻohana ʻia ʻo ia ka hoʻonui ʻana i kona wela decomposition wela, hoʻonui i ke koena i ka wā o ka hoʻoheheʻe wela, a hoʻolōʻihi i ka wikiwiki o ka hana ʻana. kinoea puhi.